Dual-state stable woodworking auxiliary instrument

Abstract

This utility model belongs to the technical field of wood processing equipment, specifically relating to a dual-state stable woodworking auxiliary device. It includes a worktable with two sets of support legs hinged below it. One set consists of two first legs, and the other set consists of two second legs. The first and second legs are arranged in pairs, and each pair has a connecting rod that hinges them together. A reinforcing plate connects the two connecting rods. Each of the two first legs has an unfolding locking component between it and its corresponding mounting bracket, and each of the two connecting rods has a folding locking component between it and its corresponding first connecting rod. In this utility model, the locking and folding components restrict the rotation of the connecting rods, thus limiting the linkage between the two support legs and preventing them from unfolding relative to each other. This ensures the stability of the support legs after folding. The unfolding locking components also ensure stability when unfolded, thereby improving the reliability of this woodworking auxiliary device.

Description

Technical Field

[0001] This utility model belongs to the technical field of wood processing equipment, specifically relating to a dual-state stable woodworking auxiliary instrument. Background Technology

[0002] When processing wood, a workbench is typically used for stability. Existing workbenches consist of a worktable surface and two pairs of legs, both of which can rotate. A hinged linkage between the legs enhances their interoperability, allowing rotation of one leg to automatically rotate the other, improving ease of operation. To ensure reliable operation, the legs must be stable when fully extended, hence the use of locking mechanisms. However, stability when folded is less critical. Therefore, to reduce costs, folded stability is often achieved through interference fits in the leg hinges. These interference fits allow the legs to rotate when force is applied and stop when force is released. However, after repeated rotations, the hinges can loosen, especially at the hinges of the already flexible linkages. Consequently, the legs may rotate and unfold on their own due to their own weight or other external forces, affecting the installation, transportation, or storage of the workbench when not in use.

[0003] For example, a quick-linkage woodworking auxiliary device disclosed in CN221391453U includes two sets of paired first and second legs, with a connecting rod connecting the first and second legs. The first leg is also equipped with a locking component to lock the state when the legs are unfolded, ensuring the stability of the workbench. However, this technical solution does not have a locking structure to ensure the stability of the legs when they are folded after rotation. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies and provide a dual-state stable woodworking aid, which is equipped with an unfolding locking component and a folding locking component. This allows the woodworking aid to remain stable both when unfolded and folded, achieving dual-state stability. The locking and folding component restricts the linkage between the two support legs by limiting the rotation of the linkage rod, preventing the two support legs from unfolding relative to each other. Furthermore, it restricts one set of support legs after folding, further ensuring the folding stability of the support legs.

[0005] To solve the above problems, the present invention adopts the following solution: A dual-state stable woodworking auxiliary device includes a worktable with a pair of mounting bases at its bottom. Each mounting base has a mounting bracket fixedly connected to it, and each mounting bracket is hinged to a support leg. One set of support legs consists of two first legs, and the other set consists of two second legs. The first and second legs are arranged in pairs, forming two pairs. Each pair of first and second legs is connected by a linkage connecting the two legs. A reinforcing plate is also connected between the two linkages near one end of the first leg. The first leg and the corresponding mounting bracket are both provided with an unfolding locking assembly, and the two linkage rods and the corresponding first linkage rod are both provided with a folding locking assembly. The folding locking assembly includes a screw-connecting drive pin that connects the reinforcing plate and the linkage rod through a thread, a drive plate located at the lower end of the screw-connecting drive pin, and a wedge-shaped locking block with a pushing slope and an edge. The wedge-shaped locking block is elastically slidably connected in the locking hole, which passes through and is closely attached to the inner wall of the linkage rod and the first leg. The drive plate can be separated from and abutted against the pushing slope as the screw-connecting drive pin rotates up and down.

[0006] In the above scheme, the folding locking assembly can be screwed onto a drive pin, causing it to move downwards and driving the drive plate downwards. The drive plate abuts against the inclined surface of the wedge-shaped locking block, pushing the wedge-shaped locking block into the locking hole, thereby connecting and locking the linkage rod with the first leg and preventing the linkage rod from rotating relative to the first leg, ensuring the stability of the two support legs after rotation and folding. The wedge-shaped locking block has sharp edges to ensure that the linkage rod does not rotate around it.

[0007] Preferably, the first leg is hollow inside, and a connecting plate is provided on the hollow inner wall near the locking hole. The connecting plate is connected to a return spring facing the locking hole. The other end of the return spring can be separated from and abut against the wedge-shaped locking block. When the drive plate separates from the wedge-shaped locking block, the side wall end of the wedge-shaped locking block is located in the side wall portion of the linkage in the locking hole, while the return spring is at its original length and its end is located in the side wall portion of the first leg in the locking hole. When the drive plate pushes the wedge-shaped locking block to its limit, the side wall end of the wedge-shaped locking block is located in the side wall portion of the first leg in the locking hole, and the return spring is compressed. The energy stored in this compression can push the wedge-shaped locking block to move to the side wall portion of the linkage in the locking hole again after being released without obstruction.

[0008] With the reset spring configured as described above, when the drive plate moves upward and disengages from the wedge locking block under the action of the screw-in drive pin, the wedge locking block can rebound under the elastic action of the reset spring and return to the side wall of the linkage rod in the locking hole. Therefore, this structure can maintain the linkage between the linkage rod and the first leg rod when the folding locking assembly is not locked, thus maintaining the linkage between the two support legs.

[0009] Preferably, the bottom end of the wedge-shaped locking block is also slidably connected to a support plate. This slid connection is achieved by a slider on the support plate and a slide rail formed on the bottom wall of the wedge-shaped locking block and cooperating with the slider. The support plate is connected to the linkage rod, and its upper end is on the same plane as the bottom end of the locking hole.

[0010] A support plate is provided to improve the sliding stability of the wedge-shaped locking block. At the same time, the support plate can also serve as a limit indicator for the extreme position of the drive plate's downward movement.

[0011] Preferably, a double-acting spring is connected to the lower end of the drive plate, and a base plate is connected to the lower end of the double-acting spring. The base plate is connected to the side plate of the reinforcing plate.

[0012] The double-acting spring provides an upward force to the screw drive pin, preventing it from loosening. Additionally, part of the spring force acts on the wedge locking block via the drive plate, resisting the force of the return spring and ensuring the stable insertion of the wedge locking block in the locking hole. This, in turn, ensures the stable locking of the folding locking assembly to the linkage and the first foot rod.

[0013] Preferably, the mounting base has a cavity with its lower end communicating with the outside. Elastic retaining strips protrude from the lower part of the inner walls on both sides of the cavity. A portion of the folded support leg can be accommodated within the cavity and elastically compressed by the retaining strips. This further restricts the automatic unfolding of the support leg.

[0014] Preferably, the unfolding locking assembly is symmetrically arranged, including a flip plate hinged between two mounting brackets. The flip plate has locking mating plates at both ends. The locking mating plates are hinged to the corresponding mounting brackets via hinge shafts. A reset torsion spring is sleeved on the hinge shaft to enable the flip plate to rotate back to its original position after rotation. The locking mating plates have movable notches, and the first leg rods have fixed notches. Locking pins are fixedly connected to the ends of the two first leg rods near the worktable surface. The fixed notches are located on the rotation path of the locking pins, and the movable notches are also located on the rotation path of the locking pins as the flip plate rotates downward, so that the locking pins can rotate with the first leg rods and successively engage with the fixed notches and movable notches.

[0015] Therefore, when the support legs need to be stably deployed, the locking pins on the first leg can be engaged with the fixed notch and the movable notch in sequence to restrict the rotation of the locking pins and the first leg connected to them, thereby ensuring the stability of the worktable during deployment. When the support legs need to be rotated and folded, the flip plate can be turned down to disengage the movable notch from the locking pin, and then the two first legs can be rotated to disengage the locking pins from the fixed notch. Continuing to rotate the first legs will then achieve rotational folding. The flip plate, under the action of the return torsion spring, will rotate back and return to its initial state. Preferably, the mounting bracket includes an inner side plate and an outer side plate that are parallel to each other, wherein the first leg and the second leg are both located between the inner side plate and the outer side plate, the outer side plate is fixedly connected to the mounting base, and the fixing notch is formed in the inner side plate.

[0016] By setting inner and outer side plates, the first and second legs are made more stable and reliable when rotating within the mounting bracket. A fixed notch is provided on the inner side plate, which is immovable. This notch forms a static-dynamic fit with the movable notch on the locking mating plate, ensuring the stable restriction of the locking pin by the two notches.

[0017] Preferably, the two first legs are hinged to the two mounting brackets via two first pins, and the second legs are hinged to the two mounting brackets via two second pins. Both hinges are interference fits, and the first pins are lower than the second pins.

[0018] In the above configuration, the first pin of the first leg is lower than the second pin of the second leg, so that both can rotate relative to the mounting bracket during the rotation of the folding support frame. The staggered height of the first and second pins ensures that the first and second legs will not interfere with each other during rotation.

[0019] Preferably, the locking plate is further provided with an arc-shaped guide hole that can limit its rotation angle. A guide pin is inserted into the arc-shaped guide hole. The guide pin adopts a bolt structure and passes through the inner side plate.

[0020] By setting arc-shaped guide holes, the rotation angle of the flip plate can be easily limited, avoiding excessive rotation and improving the overall structural compactness.

[0021] Preferably, the side wall of the locking plate is provided with a guide slope adjacent to the movable notch, and the end of the guide slope is connected to the opening end of the movable notch.

[0022] By setting a guide ramp, the locking pin can automatically slide into the movable notch. When the support leg is switched from the folded state to the unfolded state, the first leg is rotated, and the locking pin will rotate synchronously with the first leg. Then the locking pin will automatically engage with the fixed notch. When the locking pin is engaged with the fixed notch, it will first press the locking mating plate along the guide ramp, and the torsion spring will generate elastic deformation. When the locking pin is at the open end of the movable notch, the locking pin will automatically slide into the movable notch, and the unfolded locking assembly will automatically switch to the locked state.

[0023] The beneficial effects of this utility model are as follows: This invention, by setting up an unfolding locking component and a folding locking component, enables the woodworking aid to remain stable after unfolding and folding, achieving dual-state stability and thus improving the reliability of the woodworking aid.

[0024] The locking folding assembly of this utility model restricts the rotation of the linkage link to limit the linkage rotation between the two support legs, so that the two support legs cannot be unfolded relative to each other, thereby initially ensuring the stability of the support legs after folding. Then, the rotation of one set of support legs is fixed and restricted after folding, further ensuring the folding stability of the support legs. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model when unfolded; Figure 2 for Figure 1 A magnified view of a section at point I; Figure 3 This is a schematic diagram of the structure of this utility model after folding; Figure 4 This is a partial structural diagram of the present invention after folding and cutting off part of the mounting base; Figure 5 for Figure 4 Enlarged view of a section at point II; Figure 6 This is a two-dimensional structural diagram of the folding locking component in this utility model.

[0026] Reference numerals: Workbench 11, Mounting base 12, Mounting bracket 13, Cavity 121, Inner side plate 131, Outer side plate 132, Support leg 20, First leg 21, Second leg 22, First pin 211, Second pin 221, Connecting plate 212, Support crossbar 23, Linkage rod 30, Reinforcing plate 40, Unfolding locking assembly 50, Folding locking assembly 60, Elastic locking strip 70, Screw drive pin 51, Drive plate 52, Wedge locking block 53, Pushing inclined surface 531, Locking hole 54, Return spring 55, Support plate 56, Slider 571, Slide rail 572, Double-acting spring 58, Base plate 59, Flip plate 61, Hinge shaft 62, Return torsion spring 63, Movable notch 64, Fixed notch 65, Locking pin 66, Arc-shaped guide hole 671, Guide pin 672, Locking mating plate 611, Guide inclined surface 612, Handle 613. Detailed Implementation

[0027] Example: This embodiment provides a dual-state stable woodworking auxiliary instrument, referencing... Figure 1It includes a worktable 11, with a pair of mounting bases 12 on both sides of the bottom of the worktable 11. Each mounting base 12 is provided with a mounting bracket 13 fixedly connected to it. Each mounting bracket 13 is hinged with a support leg 20. One set of support legs 20 consists of two first legs 21, and the other support leg 20 consists of two second legs 22. The first legs 21 and the second legs 22 are arranged in pairs to form two pairs. Each pair of first legs 21 and second legs 22 is provided with a linkage 30 that hinges the two. The two linkage 30 near the end of the first legs 21 are also connected with a reinforcing plate 40 in an inverted L shape. Each of the two first legs 21 and the corresponding mounting bracket 13 is provided with an unfolding locking component 50, and each of the two linkage 30 and the corresponding first link is provided with a folding locking component 60.

[0028] Specifically, refer to Figures 4-6 The folding locking assembly 60 includes a screw-connecting drive pin 51 that connects the reinforcing plate 40 to the linkage rod 30 via a threaded connection; a drive plate 52 located at the lower end of the screw-connecting drive pin 51; and a wedge-shaped locking block 53 with a pushing inclined surface 531 and sharp edges. The wedge-shaped locking block 53 is elastically slidably engaged in a locking hole 54, which passes through the linkage rod 30 and the inner wall of the first leg 21, which are closely attached to each other. The drive plate 52 can separate and abut against the pushing inclined surface 531 as the screw-connecting drive pin 51 rotates up and down. (It should be noted that since the reinforcing plate rotates with the linkage rod, the position and shape of the locking hole are set after the support leg is folded.) More specifically, refer to Figure 6 The first foot rod 21 is hollow inside, and a connecting plate 212 is provided on the hollow inner wall near the locking hole 54. The connecting plate 212 is connected to a return spring 55 facing the locking hole 54. The other end of the return spring 55 is separable and abuts against the wedge-shaped locking block 53. When the drive plate 52 separates from the wedge-shaped locking block 53, the side wall end of the wedge-shaped locking block 53 is located in the side wall portion of the linkage 30 in the locking hole 54, while the return spring 55 is at its original length and its end is located in the side wall portion of the first foot rod 21 in the locking hole 54. The gap between this end and the side wall of the wedge-shaped locking block 53 is very small, 1-2mm. When the drive plate 52 pushes the wedge-shaped locking block 53 to its limit, the side wall end of the wedge-shaped locking block 53 is located in the side wall portion of the first foot rod 21 in the locking hole 54, and the return spring 55 is compressed. The energy accumulated by this compression can push the wedge-shaped locking block 53 to move to the side wall portion of the linkage 30 in the locking hole 54 again after being released without obstruction. (The wall thickness of the first leg and the wall thickness of the linkage can be adjusted as needed to achieve the above functions.) By means of the return spring 55, when the drive plate 52 moves upward and disengages from the wedge locking block 53 under the action of the screw drive pin 51, the wedge locking block 53 can rebound under the elastic action of the return spring 55 and return to the side wall of the linkage 30 in the locking hole 54. Therefore, this structure can ensure that the relative rotation between the linkage 30 and the first foot rod 21 is not affected when the folding locking assembly 60 is not locked, thereby ensuring the linkage between the two support legs 20.

[0029] Further, refer to Figure 5 , Figure 6 To improve the sliding stability of the wedge-shaped locking block 53, a support plate 56 is slidably connected to the bottom end of the wedge-shaped locking block 53. This sliding connection is achieved through a slider 571 provided on the support plate 56 and a slide rail 572 formed in the bottom wall of the wedge-shaped locking block 53 and cooperating with the slider 571. The support plate 56 is connected to the linkage rod 30, and its upper end is on the same plane as the bottom end of the locking hole 54. At the same time, the support plate 56 can also serve as a limit indicator for the drive plate 52 to move down to its extreme position.

[0030] Further, refer to Figure 6 In this embodiment, a double-acting spring 58 is connected to the lower end of the drive plate 52, and a base plate 59 is connected to the lower end of the double-acting spring 58. The base plate 59 is connected to the side plate of the reinforcing plate 40.

[0031] The double-acting spring 58 provides an upward elastic force to the screw drive pin 51, preventing the connection of the screw drive pin 51 from becoming loose. On the other hand, part of its elastic force can also be transmitted to the drive plate 52 through the screw drive pin 51, and then the drive plate 52 acts on the wedge locking block 53, which resists the elastic force provided by the return spring 55, ensuring the stable insertion of the wedge locking block 53 in the locking hole 54, thereby ensuring the stable locking of the folding locking assembly 60 to the linkage link 30 and the first foot rod 21.

[0032] The operation and principle of the folding locking component 60 are as follows: After the unlocking and locking assembly 50 is disassembled, the two support legs 20 are rotated and folded so that the linkage 30 and the two support legs 20 are close together. At this time, the drive pin 51 can be screwed in, causing it to move down and drive the drive plate 52 down. The drive plate 52 abuts against the push slope 531 of the wedge-shaped locking block 53 and pushes the wedge-shaped locking block 53 into the locking hole 54 to the side wall of the first leg 21, thereby connecting and locking the linkage 30 and the first leg 21. The hinge parts of the first leg 21 and the second rod are not the same. Therefore, when the two are connected and locked, even with a small rotation, the two cannot rotate and unfold on their own, ensuring that the two support legs 20 remain stable after being rotated and folded.

[0033] To further ensure the stability of the support leg 20 after folding, this embodiment also utilizes the mounting base 12 to restrict the support leg 20 located nearby. (See reference) Figure 3 , Figure 4 The mounting base 12 has a cavity 121 that communicates with the outside at its lower end. The lower part of the inner wall on both sides of the cavity 121 is provided with elastic clips 70. When the support frame 20 is folded, a part of it can be accommodated in the cavity 121 and forms an elastic compression with the elastic clips 70, thereby restricting the automatic downward rotation of the support frame 20.

[0034] refer to Figure 1 , Figure 2 The specific structure of the unfolding locking component 50 described in this embodiment is as follows: The unfolding locking assembly 50 is symmetrically arranged and includes a flip plate 61 hinged between two mounting brackets 13. The flip plate 61 has locking mating plates 611 at both ends. The locking mating plates 611 are connected to the corresponding mounting brackets 13 through hinge shafts 62. The hinge shafts 62 are sleeved with a reset torsion spring 63 that enables the flip plate 61 to rotate back to its original position after rotation. The locking mating plates 611 have movable notches 64, and the first leg 21 has fixed notches 65. The ends of the two first leg 21 near the worktable 11 are fixedly connected with locking pins 66. The fixed notches 65 are located on the rotation path of the locking pins 66, and the movable notches 64 are also located on the rotation path of the locking pins 66 as the flip plate 61 rotates downward, so that the locking pins 66 can rotate with the first leg 21 and successively engage with the fixed notches 65 and the movable notches 64.

[0035] The working principle of the aforementioned unfolding locking component 50 is as follows: When the support leg 20 needs to be stably unfolded, the locking pin 66 on the first leg 21 can be inserted into the fixed notch 65 and the movable notch 64 in sequence to restrict the rotation of the locking pin 66 and the first leg 21 connected to it, thereby ensuring the stability of the worktable when unfolded. When the support leg 20 needs to be rotated and folded, the flip plate 61 can be turned down to disengage the movable notch 64 from the locking pin 66. Then, the first leg 21 can be rotated to disengage the locking pin 66 from the fixed notch 65. The first leg 21 can then be rotated to achieve rotation and folding. The flip plate 61 will then rotate back and return to its initial state under the action of the return torsion spring 63. In this embodiment, reference Figure 1 , Figure 2 The mounting bracket 13 includes an inner side plate 131 and an outer side plate 132 that are parallel to each other. The first leg 21 and the second leg 22 of each pair are located between their respective inner side plate 131 and outer side plate 132, making their rotation more stable and reliable. The outer side plate 132 is fixedly connected to the mounting base 12, and the fixing notch 65 is opened in the inner side plate 131.

[0036] The two first legs 21 are respectively hinged to the two mounting brackets 13 via two first pins 211, and the two second legs 22 are hinged to the two mounting brackets 13 via two second pins 221. The two hinges are both interference fits. The first pins 211 are lower than the second pins 221, so that during the rotation of the folding support leg 20, the first legs 21 and the second legs 22 can rotate relative to the mounting brackets 13, and they will not interfere with each other during rotation.

[0037] To ensure the stability of the two support legs 20, please refer to... Figure 1 , Figure 3 Supporting crossbars 23 are provided between the two first links and between the two second links.

[0038] Further, refer to Figure 2 This facilitates limiting the rotation angle of the flip plate 61, preventing excessive rotation, and improving the overall structural compactness. The locking plate 611 is also provided with an arc-shaped guide hole 671 that can limit its rotation angle. A guide pin 672 is inserted into the arc-shaped guide hole 671. The guide pin 672 adopts a bolt structure and passes through the inner side plate 131.

[0039] Further, refer to Figure 2 The side wall of the locking plate 611 is provided with a guide slope 612 adjacent to the movable notch 64, and the end of the guide slope 612 is connected to the opening end of the movable notch 64.

[0040] By setting the guide slope 612, the locking pin 66 can automatically slide into the movable notch 64. When the support leg 20 is switched from the folded state to the unfolded state, the first leg 21 is rotated, and the locking pin 66 will rotate synchronously with the first leg 21 and automatically engage with the fixed notch 65. When the locking pin 66 is engaged with the fixed notch 65, it will first press the locking mating plate 611 along the guide slope 612, and the torsion spring will generate elastic deformation. When the locking pin 66 is at the open end of the movable notch 64, the locking pin will automatically slide into the movable notch 64, and the unfolded locking assembly 50 will automatically switch to the locked state.

[0041] Further, refer to Figure 1 To facilitate the downward rotation of the flip plate 61, a handle 613 is provided in the middle of the flip plate 61. Therefore, the flip plate 61 can be rotated downward by pressing down the handle 613.

Claims

1. A dual-state stable woodworking auxiliary instrument, comprising a worktable (11), the bottom of which is provided with a pair of mounting bases (12), each mounting base (12) being provided with a mounting bracket (13) fixedly connected thereto, each mounting bracket (13) being hinged with a support leg (20), wherein one set of support legs (20) consists of two first legs (21), and the other support leg (20) consists of two second legs (22), the first legs (21) and the second legs (22) being arranged in pairs and forming two pairs, each pair of first legs (21) and second legs (22) being provided with a linkage rod (30) hinged between the two, and a reinforcing plate (40) being connected between the two linkage rods (30) near one end of the first legs (21); characterized in that, An unfolding locking assembly (50) is provided between each of the two first leg rods (21) and the corresponding mounting bracket (13), and a folding locking assembly (60) is provided between each of the two linkage rods (30) and the corresponding first linkage rod. The folding locking assembly (60) includes a screw drive pin (51) that connects the reinforcing plate (40) and the linkage rod (30) by thread, a drive plate (52) located at the lower end of the screw drive pin (51), and a wedge-shaped locking block (53) with a pushing slope (531) and an edge. The wedge-shaped locking block (53) is elastically slidably in the locking hole (54). The locking hole (54) passes through the linkage rod (30) and the inner side wall of the first leg rod (21) that are closely attached to it. The drive plate (52) can be separated from and abutted against the pushing slope (531) as the screw drive pin (51) rotates up and down.

2. The dual-state stable woodworking auxiliary instrument according to claim 1, characterized in that, The first leg (21) is hollow inside. A connecting plate (212) is provided on the hollow inner wall near the locking hole (54). The connecting plate (212) is connected to a return spring (55) facing the locking hole (54). The other end of the return spring (55) can be separated from and abut against the wedge-shaped locking block (53). When the drive plate (52) separates from the wedge-shaped locking block (53), the side wall end of the wedge-shaped locking block (53) is located in the side wall part of the linkage link (30) in the locking hole (54), while the return spring (55) is at its original length and its end is located in the side wall part of the first leg (21) in the locking hole (54). When the drive plate (52) pushes the wedge-shaped locking block (53) to the limit, the side wall end of the wedge-shaped locking block (53) is located in the side wall part of the first leg (21) in the locking hole (54), and the return spring (55) is compressed.

3. The dual-state stable woodworking auxiliary instrument according to claim 2, characterized in that, The bottom end of the wedge-shaped locking block (53) is also slidably connected to a support plate (56). This slid connection is achieved by a slider (571) provided on the support plate (56) and a slide (572) opened on the bottom wall of the wedge-shaped locking block (53) and cooperating with the slider (571). The support plate (56) is connected to the linkage rod (30), and its upper end is on the same plane as the bottom end of the locking hole (54).

4. The dual-state stable woodworking auxiliary instrument according to claim 1, characterized in that, The lower end of the drive plate (52) is connected to a double-acting spring (58), and the lower end of the double-acting spring (58) is connected to a base plate (59). The base plate (59) is connected to the side plate of the reinforcing plate (40).

5. The dual-state stable woodworking auxiliary instrument according to any one of claims 1-4, characterized in that, The mounting base (12) has a cavity (121) that communicates with the outside at the lower end. The lower part of the inner wall on both sides of the cavity (121) is provided with elastic clips (70). The folded support bracket (20) can be partially accommodated in the cavity (121) and elastically compressed with the elastic clips (70).

6. The dual-state stable woodworking auxiliary instrument according to claim 1, characterized in that, The unfolding locking assembly (50) is symmetrically arranged and includes a flip plate (61) hinged between two mounting brackets (13). The flip plate (61) has locking mating plates (611) at both ends. The locking mating plates (611) are hinged to the corresponding mounting brackets (13) through hinge shafts (62). The hinge shafts (62) are sleeved with a return torsion spring (63) that enables the flip plate (61) to rotate back to its original position after rotation. The locking mating plates (611) have movable notches (64). The first leg (21) has a fixed notch (65), and the ends of the two first legs (21) near the worktable (11) are fixed with locking pins (66). The fixed notch (65) is located on the rotation path of the locking pin (66), and the movable notch (64) is also located on the rotation path of the locking pin (66) as the flip plate (61) rotates downward. The locking pin (66) can rotate with the first leg (21) and be inserted into the fixed notch (65) and the movable notch (64) in turn.

7. The dual-state stable woodworking auxiliary instrument according to claim 6, characterized in that, The locking plate (611) is also provided with an arc-shaped guide hole (671) that can limit its rotation angle. A guide pin (672) is inserted into the arc-shaped guide hole (671). The guide pin (672) adopts a bolt structure and passes through the mounting bracket (13).

8. The dual-state stable woodworking auxiliary instrument according to claim 6, characterized in that, The side wall of the locking plate (611) is provided with a guide slope (612) adjacent to the movable notch (64), and the end of the guide slope (612) is connected to the opening end of the movable notch (64).

9. The dual-state stable woodworking auxiliary instrument according to claim 6, characterized in that, The mounting bracket (13) includes an inner side plate (131) and an outer side plate (132) that are parallel to each other. The first leg (21) and the second leg (22) are both located between the inner side plate (131) and the outer side plate (132). The outer side plate (132) is fixedly connected to the mounting base (12). The fixing notch (65) is opened in the inner side plate (131).

10. The dual-state stable woodworking auxiliary instrument according to claim 1, characterized in that, The two first legs (21) are hinged to the two mounting brackets (13) respectively through the two first pins (211), and the second leg (22) is hinged to the two mounting brackets (13) through the two second pins (221). The two hinges are both interference fits, and the first pin (211) is lower than the second pin (221).

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